Satisfactory Production Ratios: Smelters per Miner

A Normal Mk.1 Miner feeds 2 Iron or Copper Smelters: 60 ore/min ÷ 30 per Smelter. At 100% clock, Mk.2 and Mk.3 feed 4 and 8 Smelters on Normal nodes. [1]

Iron/Copper, standard ingots; no leftover ore. All rates below use 100% clock, no Somersloops and continuous supply. [1]

Two-Smelter setup: split the 60 ore/min input evenly into 2 branches of 30 ore/min. Mk.1 belts carry the input and each output; each Smelter makes 30 ingots/min, or 60 ingots/min merged. Keep both outputs moving. [1] [4]

Reinforced Iron Plates: one standard Assembler makes 5/min; a balanced 10/min needs 120 Iron Ore/min and 14 production buildings (excluding miners and logistics). [1]

Production optimizer → · Miner calculator →

By Satisfactory Calculator · Updated October 29, 2026

How many Reinforced Iron Plates?

One standard Assembler makes 5 Reinforced Iron Plates/min. The smallest balanced whole-building chain makes 10/min from 120 Iron Ore/min: 4 Smelters + 3 Plate Constructors + 2 Rod Constructors + 3 Screw Constructors + 2 Assemblers. These 14 production buildings run continuously at 100% clock, with standard recipes, no Somersloops and no intermediate surplus; miners and logistics are excluded. [1]

Reinforced Iron Plate calculator → · Compare the whole-chain row ↓

Back to quick answer · Next: Miner ratios

How many smelters or first-stage machines per miner?

Exact machine equivalents are supply ÷ recipe input. Fractions need clock tuning or intermittent operation; “full” counts only continuously fed machines. Other ingredients are supplied separately. [1]

Purity multipliers: Impure ×0.5; Normal ×1; Pure ×2. These are throughput scenarios, not a claim that every purity exists for every resource on the map. [2]

Smallest whole-building production ratios

Each row is the smallest balanced set for that standard chain: all production buildings run continuously at full clock, with no intermediate surplus. Scale the entire row by a whole number to keep that balance. Counts exclude miners and logistics; each stage is named so parallel branches stay visible. [1]

“Smallest” requires every intermediate to balance with no surplus; a smaller factory can produce less using idle time or clock tuning. These are default-recipe sets, not alternate-recipe comparisons. Use the optimizer for other recipes or Modular Frame calculator for a custom target.

Back to quick answer · Next: Advanced miner recipes

Advanced miner recipes: Quartz, Sulfur, Uranium, Bauxite and SAM

Open a named recipe group for its inputs, outputs and all nine miner/purity scenarios. Matching input rates share one matrix; they do not share ingredients or outputs. Purities are throughput scenarios, not map-node availability. [1]

Back to quick answer · Next: Belts & pipes

Belt and pipe limits: how many machines fill a belt?

Conveyor capacities come directly from the export. The example is standard Screws: 40 items/min per final Constructor; a complete minimum chain makes 120/min. “Final” counts only Screw Constructors; the expandable chain includes smelting and rods. [1]

Whole sets = complete 120/min Screw chains that fit without exceeding the belt. Spare = unused belt capacity, items/min. Exact-fill columns are capacity equivalents; fractions need clock tuning or intermittent operation.

Check the miner belt too: Normal Mk.1 needs at least Mk.1 for 60 ore/min; Normal Mk.2 needs at least Mk.2 for 120 ore/min; Normal Mk.3 needs at least Mk.3 for 240 ore/min. A downstream splitter cannot increase the capacity of the belt leaving the miner. [1] [4]

Pipeline capacities are wiki-sourced constants alongside this versioned calculation; the export contains no pipe-capacity field. They are upper transfer limits; liquid head lift and fluid flow still matter. [3]

Back to quick answer · Next: Splitter patterns

Splitter patterns that follow from the demand

A basic splitter distributes items in sequence among available outputs. Like the two-Smelter setup above, this three-way split assumes unobstructed outputs and sufficient belts; input exactly matches total demand. [4]

• One input → 3 Smelters: 90 Iron Ore/min ÷ 3 = 30 per branch. Use at least a Mk.2 input belt. [1]

The 3-way pattern needs 90 ore/min delivered to that splitter; it is a supplied-rate example, not a separate miner-purity row. An inline manifold can meet the same steady demand after upstream buffers fill, provided downstream paths remain open and total supply is sufficient. The ratio fixes demand; it does not specify startup time. [4]

Check a target split in the splitter calculator →

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Sources

1. Download versioned production ratios (JSON) — game data v1.2.3.1, exported 2026-06-25, computed 2026-10-29. Generated from src/data/sat.json, whose provenance identifies SCIM’s game-Docs-derived export; includes the source hash and calculation method.
2. Official Wiki: Miner — mining speed — purity factors and extraction formula.
3. Official Wiki: Pipelines — capacities, liquid head lift and flow behavior; verified 2026-10-29.
4. Official Wiki: Conveyor Splitter — usage — output distribution, backpressure and belt connections.

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